A genetic investigation of the KEOPS complex in Halophilic Archaea

Adit Naor, Patrick C. Thiaville, Neta Altman-Price, Ifat Cohen-Or, Thorsten Allers, Valérie de Crécy-Lagard*, Uri Gophna

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


KEOPS is an important cellular complex conserved in Eukarya, with some subunits conserved in Archaea and Bacteria. This complex was recently found to play an essential role in formation of the tRNA modification threonylcarbamoyladenosine (t6A), and was previously associated with telomere length maintenance and transcription. KEOPS subunits are conserved in Archaea, especially in the Euryarchaea, where they had been studied in vitro. Here we attempted to delete the genes encoding the four conserved subunits of the KEOPS complex in the euryarchaeote Haloferax volcanii and study their phenotypes in vivo. The fused kae1-bud32 gene was shown to be essential as was cgi121, which is dispensable in yeast. In contrast, pcc1 (encoding the putative dimerizing unit of KEOPS) was not essential in H. volcanii. Deletion of pcc1 led to pleiotropic phenotypes, including decreased growth rate, reduced levels of t6A modification, and elevated levels of intra-cellular glycation products.

Original languageEnglish
Article numbere43013
JournalPLoS ONE
Issue number8
StatePublished - 23 Aug 2012


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